#include<string>
#include<iostream>
#include<algorithm>
#include<cmath>
using namespace std;
bool cmp_1(char a, char b)
{
	return a>b;
}
string tostring(int x)
{
	string ans = "";
	while (x)
	{
		ans= (char)('0' + x % 10)+ans;
		x /= 10;
	}
	return ans;
}
int toint(string x)
{
	int ans = 0,i=0;
	for (int k = x.length() - 1; k >= 0; k--)
	{
		ans += (int)(x[k] - '0')*pow(10.0, i++);
	}
	return ans;
}
int main()
{
	string in;
	while (cin >> in)
	{
		if (in == "-1") break;
		cout << "N=" << in << ":" << endl;
		if ((in.length()!=4)||in[0] == in[1] && in[1] == in[2] && in[2] == in[3])
		{
			cout << "No!!" << endl;
			continue;
		}
		sort(in.begin(), in.end(), cmp_1);
		string re = in;
		reverse(re.begin(), re.end());
		int t = 0;
		while (true)
		{
			t++;
			int ans = toint(in) - toint(re);
			cout << toint(in) << "-" << toint(re) << "="
				<< ans << endl;
			if (ans == 0 || ans == 6174)
			{
				break;
			}
			else{
				in = tostring(ans);
				sort(in.begin(), in.end(),cmp_1);
				re = in;
				reverse(re.begin(), re.end());
			}
		}
		cout << "Ok!! " << t << " times" << endl;
	}
	return 0;
}

• Re:输入少于或者大于4位都要No!! (41) cotl 2021-09-08 06:38:49